We first study how sterile neutrinos can fit the 5sigma (V) over bar (mu) --> (v) over bar (e) LSND anomaly: 2 + 2 solutions are strongly disfavoured by solar and atmospheric data, while 3 + I solutions can still give a poor fit (for a specific range of oscillation parameters, to be tested by MiniBooNE). If MiniBooNE will see no v(mu) --> v(e) transitions, we will have a hint for CPT violation. Already now, unlike sterile neutrinos, CPT-violating neutrino masses can accommodate all safe and unsafe data. We study how much CPT must be conserved according to atmospheric and K2K data and list which CPT-violating signals could be discovered by forthcoming solar and long-baseline experiments. (C) 2002 Elsevier Science B.V. All rights reserved.
Interpreting the LSND anomaly: sterile neutrinos or CPT-violation or... ?
STRUMIA, ALESSANDRO
2002-01-01
Abstract
We first study how sterile neutrinos can fit the 5sigma (V) over bar (mu) --> (v) over bar (e) LSND anomaly: 2 + 2 solutions are strongly disfavoured by solar and atmospheric data, while 3 + I solutions can still give a poor fit (for a specific range of oscillation parameters, to be tested by MiniBooNE). If MiniBooNE will see no v(mu) --> v(e) transitions, we will have a hint for CPT violation. Already now, unlike sterile neutrinos, CPT-violating neutrino masses can accommodate all safe and unsafe data. We study how much CPT must be conserved according to atmospheric and K2K data and list which CPT-violating signals could be discovered by forthcoming solar and long-baseline experiments. (C) 2002 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
